Mold for building-blocks.



PATENTBD NOV.l 7,1905.

Nuo. 804,122.

G. J. W. HAYES.

. MULD FOB. BUILDING BLOCKS.

APPLIUATION FILED MAR. 13, 1905.

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@cw/km WITNES SES Unrrn- STATES PATENT rricn. l

MOLD FOR BUILDING-BLOCKS.

Specification of Letters Patent.

Patented Nov. '7, 1905.

Application led March 13, 1995. Serial No. 249,699.

T0 a/ZZ whom it may concern:

Be it known that I, CHARLES J. W. HAYES, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Molds for Building-Blocks; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art t0 which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to molds for buildingblocks; and its object is an improved mold for making ribbed blocks by the so-called Lface down method-t'. c., the tamping of the material to be molded directly against that part of the mold which forms the face of the block.

While the mold here shown and described is designed particularly for making the block which is the subject of my pending application for Patent Serial No. 228,717, the invention may be readily adapted to the making of other ribbed and similar blocks, and this application is intended to cover such adaptations.

In the drawings, Figure l is a perspective of the assembled mold. Fig. 2 is a cross-section at the middle of the mold. Fig. 3 is a detail of the hinge connection between the two rib-forming parts of the mold.

In this mold the principal parts are a receptacle in the form of a flanged edge shallow pan or tray for molding the face and tabular part of the block. Two forms open through from top to bottom, hinged together and arranged to lit on top of the tray for molding the ribs of the block, and two plates fitting between the hinged forms for molding' the ends of the main or mid-rib of the block and its bonding grooves.

The tray A is made with a bottom e of such contour as is desired for the face of the block and with sides c2 of a height equal to the desired thickness of the tabular part of the block and with a liange c3 extending all around the edge and strengthened by ribs at the four corners. The flange of the tray serves as a seat for the forms B, which arebrought to correct position on the tray by means of dowel-end screws E, entering holes in the flange of the tray. The forms B are duplicate and each has a horizontal plate part b,

from which rises parallel walls2 and 3, 1 and 55, radiating in diminishing height from the middle of wall toward the corners of the plate when the parallel walls join in a square corner and connect by a rib to the hand-grip 58. Wall Z2 has at each end a vertical rib b9, Vand at the top extending from these ribs knuckles 510 and H, so positioned that when the forms B arein line opposed these knuckles come end to end and with journalend capscrews D make joints that hold the forms B together. On knuckle Z210 is a lug 512, which strikes the top of rib t when the forms are swung apart a certain distance and prevents them swinging farther. At each end of the space inclosed by the opposing walls t and the ribs b9 is fitted a vertical plate C, having a horizontal rib c and a vertical rib c2, which hooks over the flange of the tray A, upon which it rests. It is held from outward movement by abutting against the ribs At its top edge is a depression to receive the journal end of cap-screw D. The apertures bounded by the walls 52 and b3, and b5, and the opposing walls b and plates C join together beneath the connection 67 and are open through into the tray below.

In operation the tray is first rammed full of the material to be molded and struck ofi' across the top. The forms B are then placed on top of the tray and the plates C put in position. The apertures in the forms are then rammed full, the material joining that in the tray below and the surplus material struck 0H across the top edges. The forms are now seized by the handles and gently lifted, swinging by the joints away from the molded material while supported on the plates C. IV hen the limit of the joint has been reached, the forms are lifted bodily from the block, and the plates C are taken from the sides of the block, which is allowed to remain in the tray until suliiciently set to be removed. If continuous operation is desired, sufficient number of trays should be provided to allow the required time to each tray.

What I claim is# 1. In a mold for building-blocks, the combination of a receptacle for molding a part of the block and a cover with flanged apertures for molding the remainder of the block, substantially as described.

2. In a mold for artificial-stone blocks, in

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combination with a mold for the face of such block, a plate adapted to t thereon having walled apertures adapted to receive and mold the material for the back of the block, substantially as described.

3.- In a mold for ribbed building-blocks, the combination of a tray for molding the tabular part of the block and an apertured rib- Jform fitting thereon Jfor molding the back of the block, substantially as described.

4. In a mold for making ribbed and similar slab building-blocks, the combination oi' a tray part for molding the slab part of Said block and parts hinged together and having anged apertures adapted to fit over and mold projections on the back of said slab part of block, substantially as described.

5. In a mold for artificial stone, the combination'oi' a tray, a plural-part jointed and apertured form tting thereon, and means for supporting said form when the joint is operated, substantially as described.

6. In a mold for building-blocks, in combination with a receptacle for molding a part of the block, jointed forms adapted to engage on said receptacle, and plates fitting between said forms for molding the remainder of said block, substantially. as described.

7. In a mold for building-blocks, thecombination of a tray for molding therein a part of the block, and walls adapted to engage thereon for molding other parts of said block, substantially as described.

In testimony whereof I sign this specification in the presence oi' two Witnesses.

CHARLES J. W. HAYES. 

